Configuring The Wan Mode - NETGEAR ProSafe DGFV338 Reference Manual

DGFV338 ProSafe Wireless ADSL Modem VPN Firewall Router Reference Manual
5. Click Apply to save your settings.
Note: You can also set up the traffic meter for the Ethernet ISP, if desired, at this time.
See

Configuring the WAN Mode

The WAN ports of the ProSafe Wireless ADSL Modem VPN Firewall Router can be configured
for NAT or Classical Routing. You must select one of them—NAT being the most common:
• NAT. NAT is the technology which allows all PCs on your LAN to share a single Internet IP
address. From the Internet, there is only a single device (the Router) and a single IP address.
PCs on your LAN can use any private IP address range, and these IP addresses are not visible
from the Internet.The Router uses NAT to select the correct PC (on your LAN) to receive any
incoming data.
Note: If you only have a single Internet IP address, you MUST use NAT.
• Classical Routing. In this mode, the Router performs Routing, but without NAT. To gain
Internet access, each PC on your LAN must have a valid Internet IP address.
If your ISP has allocated many IP addresses to you, and you have assigned one of these
addresses to each PC, you can choose Classical Routing. Or, you can use Classical Routing for
routing private IP addresses within a campus environment. Otherwise, selecting this method
will not allow Internet access through this Router.
Depending on the WAN port configuration of the ProSafe DGFV338, you can select one of two
options:
• Auto-Rollover using WAN port. If you have configured both the ADSL ISP and Ethernet ISP
WAN ports of the ProSafe Wireless ADSL Modem VPN Firewall Router, you can select auto-
rollover for increased system reliability. In this mode, the selected WAN interface is made
primary and the other is the rollover link. As long as the primary link is up, all traffic is sent
over the primary link. Once the primary WAN interface goes down, the rollover link is brought
up to send the traffic.
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"Programming the Traffic Meter" on page
v1.0, April 2007
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Basic Installation and Configuration